Names of the Headstones in Liberty, Me

My greatgrandfather was James Overlock of Liberty/Washington, Me.He was married to Olie Powell.I'm not sure of her name, they called her Olie?They had three children. Goldie, ALton and Sylvia Pauline Overlock Gushee.Sylvia Gushee or Polly was my Grandmother.Am I related to any of you??? Gordon Gushee Los Angeles, CA